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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsMedium
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The first row of a hall has (16) chairs and each next row has (3) more chairs. If there are (425) chairs in total then how many rows are there?

Answer and explanation

Correct answer: (10)

Putting (S_n=425) in the sum formula gives (n=10). Exam tip: when total sum is given, form an equation for (n).

Related tags

ApWord-ProblemFind-NWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions ApMathematicsClass 10 Mcq
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